mingw needs "-std=gnu99" option to build with _PC_64 and _MCW_PC macros
mingw needs "-std=gnu99" option to build with _PC_64 and _MCW_PC macros

ojundt/msgpack-ruby,ojundt/msgpack-ruby,msgpack/msgpack-ruby,msgpack/msgpack-ruby,cosmo0920/msgpack-ruby,cosmo0920/msgpack-ruby,cosmo0920/msgpack-ruby,ojundt/msgpack-ruby,cosmo0920/msgpack-ruby,msgpack/msgpack-ruby,ojundt/msgpack-ruby